Question

0.4x + 0.3y = 2.5 and 0.5x *-0.3y= 1.1 then x =___​

Answer 1

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Answer:

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Answer 2

Answer:

Step-by-step explanation:

Given,

0.4x + 0.3y = 2.5 (say 1st equation )

0.5x - 0.3y = 1.1 (say 2nd equation )

Now adding 1st and 2nd equations, we get

0.4x + 0.3y + 0.5x - 0.3y = 2.5 - 1.1

+ 0.3y and - 0.3y are cancelled

0.4x + 0.5x = 2.5 - 1.1

0.9x = 1.4

x = 1.4 / 0.9 (14/10) / (9/10) = 14 /10 × 10/9 = 14/9 = 1.55

Hence x = 1.55 is the answer.